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Retirement Plans and Postretirement Benefits - (Tables) | 6 Months Ended
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Jun. 30, 2024
Retirement Benefits [Abstract] |
Components of Net Periodic Cost of Pension and Other Postretirement Employee Benefit Plans | Retirement Plans and Postretirement Benefits The following table details the components of net periodic cost of our company-sponsored pension and other postretirement employee benefit plans for the periods presented:
| Quarter Ended June 30, |  | Six Months Ended June 30, |  |
Pension Benefit Plans | 2024 | 2023 |  | 2024 | 2023 |  |  |
Service cost | $ | 0.6 |  | $ | 0.9 |  |  | $ | 1.3 |  | $ | 1.7 |  |  |  |
Interest cost | 3.0 |  | 3.1 |  |  | 5.9 |  | 6.2 |  |  |  |
Expected return on plan assets | (3.9) |  | (3.8) |  |  | (7.9) |  | (7.6) |  |  |  |
Net periodic cost | $ | (0.3) |  | $ | 0.2 |  |  | $ | (0.6) |  | $ | 0.4 |  |  |  |
|  |  | Quarter Ended June 30, |  | Six Months Ended June 30, |  |
Other Postretirement Employee Benefit Plans |  |  |  |  | 2024 | 2023 |  | 2024 | 2023 |  |  |
Service cost |  |  |  |  | $ | 0.1 |  | $ | — |  |  | $ | 0.1 |  | $ | 0.1 |  |  |  |
Interest cost |  |  |  |  | 0.7 |  | 0.7 |  |  | 1.3 |  | 1.4 |  |  |  |
Amortization of actuarial gain |  |  |  |  | (0.1) |  | (0.1) |  |  | (0.1) |  | (0.3) |  |  |  |
Net periodic cost |  |  |  |  | $ | 0.6 |  | $ | 0.6 |  |  | $ | 1.3 |  | $ | 1.2 |  |  |  |
We record the service component of net periodic cost as part of "Cost of sales" and "Selling, general, and administrative expenses," while the non-service component of net periodic cost are recorded to "Other non-operating income" on our Consolidated Statements of Operations. For the quarter and six months ended June 30, 2024, we recorded $0.6 million and $1.1 million to "Cost of sales" and $0.1 million and $0.3 million to "Selling, general, and administrative expenses." For the quarter and six months ended June 30, 2023, we recorded $0.8 million and $1.5 million to "Cost of sales" and $0.1 million and $0.3 million to "Selling, general, and administrative expenses."

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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